...的是II型胶原（I型胶原主要存在于肌腱、韧带和疤痕组织中），由三条α肽链绞合而成的三螺旋结构，称原胶原蛋白（tropocollagen），相邻氨基酸之间的共价连接保证了原胶原蛋白的稳定性。
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骨骼形成的第一步，羧基磷灰石被沉积在原胶原蛋白分子末羰之间的成核部位。
Bone formation Hydroxyapatite is deposited in nucleation sites between the ends of tropocollagen molecules as the first step in bone formation.
之后将切片卷起促使细胞产生一种由结构支撑蛋白组成的混合物，即胶原及弹性蛋白。 纤维原细胞的问题在于它们会转化为平滑的肌肉细胞，最终将血管堵塞。
They then roll up the sheet and allow the cells to produce an interpenetrating mixture of structural support proteins, known as collagen and elastin.
实验组用纤维蛋白原鄄胶原海绵片进行止血，对照组用明胶海绵片止血。
Hemostasis was performed with fibrinogen plus collagen sponge in experimental group. Hemostasis was performed gelatin sponge in control group.
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